Phenolic Tests
Ferric chloride test gives violet coloration with:
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More oxygen organics Practice Questions
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About This Question
- Subject
- chemistry
- Chapter
- oxygen organics
- Topic
- phenolic tests
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Phenol with activating group
- The Reagent: Neutral Ferrichloride solution (FeCl3).
- Target: Phenols or enols.
- Observation: When a drop of neutral FeCl3 is added to phenol, a characteristic violet, blue, or green coloration appears.
- Chemistry: This is due to the formation of a coordination complex where the phenolic Oxygen coordinates to the Fe3+ ion.
- Specificity: Aliphatic alcohols (e.g., Ethanol) do not form such stabilized complexes and therefore show no such color change, making this a classic test to distinguish phenols from alcohols.
This medium difficulty chemistry question is from the chapter oxygen organics, covering the topic of phenolic tests. It appeared in the 2025 exam.
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